minix/lib/libsys/sqrt_approx.c

   1 #include <minix/sysutil.h>
   2
   3 u32_t sqrt_approx(u32_t in)
   4 {
   5         int b, v = 0;
   6         for(b = (sizeof(in)*8)/2-1; b >= 0; b--) {
   7                 u32_t n = v | (1UL << b);
   8                 if(n*n <= in)
   9                         v = n;
  10         }
  11
  12         return v;
  13 }
  14